After all of the anticipation, free agency is finally here. And it will be frenetic. Teams have already begun extending qualifying offers and designating core players. They’re also deciding which unsigned players’ rights to retain. Starting Wednesday, they can officially begin negotiating with free agents — an incredibly pivotal period that will last all of three days before signings can start on Saturday. To get as ready as possible for the chaos that will ensue, we’ve already gone through the